Only a teen and already a wild child, Georgina relies on alcohol and lies to make sure she gets her way–which usually means screwing over nemesis Serena (Blake Lively). Among her heinous acts: pretending to be someone else and blackmail.

2. Gossip Girl (voiced by Kristen Bell)

She/he is the source of many problems in the halls of Constant Billard and St. Judes. By simply exposing damaging secrets via text or her blog, Gossip Girl’s identity remains a mystery.

(click twice to watch)

I debated whether or not to included Chuck (Ed Westwick) and Blair (Leighton Meester) as villains but ultimately decided not to as I think they have many more redeeming qualities to them than any of the others I included on my list.

I think we can all agree that there are no outright villains on 90210 (yet) so my list ends here.

KEMattison via Twitter: Will Chad Michael Murray and Hilarie Burton be making any guest appearances on One Tree Hill this season?
Our sources tell us it’s doubtful that we’ll see CMM or H.M. again on One Tree Hill, but perhaps in the finale.

Aprilnich via Twitter: Will Brooke and Julian last on One Tree Hill?
TV diva’s Magic 8-Ball says: “Signs point to yes.”

Mary in Seattle: Is there going to be a time jump again this year on One Tree Hill?
Nothing as drastic as last season, but One Tree Hill does leap forward a year when the show returns this fall.

Dan’s pre-show history already gave us a reason to dislike him: he abandoned baby mama Karen (Moira Kelly) and had nothing to with their son Lucas (Chad Michael Murray). Couple that with various schemes, back-stabbing and plain old maliciousness, Dan has very few friends in One Tree Hill. And then there’s the biggest sin of all: murdering his own brother, Keith (Craig Sheffer). Despite many near-death experiences (burned in a fire, hit by a car, a faulty heart, etc.), Dan has managed to survive all six seasons of the show. His future remains unclear, though.

2. Psycho Derek (played by Matt Barr)

Quite possibly the creepiest and scariest character on the show, he first appeared claiming to be the long-lost brother of Peyton (Hilarie Burton). Turns out, he was actually a psycho (hence the nickname) who’s warped ways of trying to woo Peyton included attacked her. After a fight with Lucas and the real Derek (Ernest Waddell), he disappeared…only to return on prom night and attack Peyton again, along with Brooke (Sophia Bush). This time he ended up in jail.

3. Victoria Davis (played by Daphne Zuniga)

Though she’s the mother of Brooke, we didn’t actually meet Victoria until season 5. The most cold-hearted mother on any of the teen dramas, Victoria repeatedly insults Brooke and tries to take advantage of her and her company. They reconciled at the end of season 6 but I can’t imagine it lasting.

4. Nanny Carrie (played by Torrey DeVitto)

Hired as a nanny (again, hence the nickname) for Jamie (Jackson Brundage), the first signs of Carrie’s evilness came when she started hitting on married Nathan (James Lafferty). After being fired, Carrie kidnapped Jamie, who was rescued by Dan, of all people. A vengeful Carrie resurfaced the following season, this time kidnapping Dan and nearly killing him. Haley (Bethany Joy Galeotti) and Deb (Barbara Alyn Woods) inadvertently rescued him, and Carrie is presumed to be dead from a gunshot wound.

The first teen drama to have an adult villain, Julie’s preoccupation with money and the superficial caused her to beytray her closest friends, as well as her husband and daughter. Among her worst acts: running a gigolo business and sleeping with her daughter’s ex-boyfriend.

2. Kevin Volchok (played by Cam Gigandet)

The sins don’t get any worse than this: killing someone! The someone being Marissa (Mischa Barton). Between that and constantly fighting with Ryan (Benjamin McKenzie), he’s a pretty hateable character.

Part Four tomorrow will highlight the one villian who keeps escaping death.

The Blink-182 cover story in the July issue of Alternative Press features not one but two teen drama references. First, Mark Hoppus (when talking about getting the band back together) said they had to make like “Beverly Hills 90210 and squash it,” a reference to episode 5.27. Second, Tom DeLonge said it was right after he filmed the Angels and Airwaves appearance on One Tree Hill (episode 6.10) that he found out about Travis Barker’s plane accident.